【摘要】：在城市數(shù)字化的建設(shè)過(guò)程中，GIS的應(yīng)用日趨廣泛，尤其是WebGIS在電子商務(wù)、電子政務(wù)、軍警等領(lǐng)域的信息系統(tǒng)應(yīng)用越來(lái)越廣泛，同時(shí)，隨著計(jì)算機(jī)軟硬件的迅速發(fā)展，電子移動(dòng)終端不斷涌現(xiàn)，通信技術(shù)的發(fā)展、3G等業(yè)務(wù)的普及，信息交流共享移動(dòng)化趨勢(shì)逐步增大，使得移動(dòng)GIS的應(yīng)用越來(lái)越普及。在應(yīng)用的過(guò)程中，GML數(shù)據(jù)格式的出現(xiàn)解決了由于不同廠商數(shù)據(jù)格式的不同帶來(lái)數(shù)據(jù)的共享、交換的問(wèn)題，但同時(shí)由于GML格式數(shù)據(jù)的數(shù)量巨大、采用明文傳輸?shù)忍攸c(diǎn)，在現(xiàn)有無(wú)線網(wǎng)速較低、安全性較差的情況下，如何提高數(shù)據(jù)交換的效率、如何在浩瀚的數(shù)據(jù)中保證數(shù)據(jù)的安全性成為當(dāng)前移動(dòng)GIS環(huán)境中GML數(shù)據(jù)應(yīng)用需要研究的關(guān)鍵問(wèn)題，同時(shí)，如何在終端上進(jìn)行部署成為應(yīng)用中的又一關(guān)鍵問(wèn)題。 為了達(dá)到提高數(shù)據(jù)在移動(dòng)環(huán)境下的交換效率，本文在通用壓縮算法的基礎(chǔ)上，針對(duì)GML數(shù)據(jù)的特點(diǎn)，，通過(guò)解析，使得結(jié)構(gòu)和空間數(shù)據(jù)分離，并分別采用標(biāo)簽壓縮和增量壓縮的方法，使得數(shù)據(jù)的壓縮率得到極大的提升，有效的降低了數(shù)據(jù)體積。 為了保證商業(yè)等方面的數(shù)據(jù)在移動(dòng)環(huán)境下的安全，對(duì)數(shù)據(jù)進(jìn)行加密等安全方面的研究。在數(shù)據(jù)的加密上，不再依賴于傳統(tǒng)的無(wú)線鏈路安全機(jī)制。借鑒XML的安全標(biāo)準(zhǔn)，根據(jù)GML數(shù)據(jù)的特點(diǎn)，編寫了基于元素和元素內(nèi)容的加密算法，使得巨大的GML數(shù)據(jù)加密成為可能，并對(duì)對(duì)稱加密和非對(duì)稱加密在GML元素加密中的實(shí)現(xiàn)進(jìn)行了研究。 在.NET的環(huán)境下，使用C#語(yǔ)言完成了針對(duì)前面研究結(jié)果的原型系統(tǒng)的搭建，并在不同的終端條件下進(jìn)行了一定的測(cè)試與分析。針對(duì)在不同終端中的應(yīng)用問(wèn)題，從平臺(tái)的搭建和軟件的部署等方面探討了在應(yīng)用中各種問(wèn)題并給出合適的解決方法。
[Abstract]:In the process of urban digitization, the application of GIS is becoming more and more extensive, especially the application of WebGIS in e-commerce, e-government, military and police and other fields. At the same time, with the rapid development of computer software and hardware, With the continuous emergence of electronic mobile terminals, the development of communication technology, the popularity of 3G and other services, the mobile trend of information exchange and sharing is gradually increasing, which makes the application of mobile GIS more and more popular. In the process of application, the emergence of GML data format solves the problem of data sharing and exchange due to the different data formats of different manufacturers, but at the same time, because of the huge amount of GML format data, it adopts clear text transmission and so on. In the case of low speed and poor security of the existing wireless network, how to improve the efficiency of data exchange and how to ensure the security of data in the vast data has become the key problem to be studied in the current mobile GIS environment. At the same time, how to improve the efficiency of data exchange and how to ensure the security of data in the vast data has become the key problem to be studied in the current mobile GML environment. How to deploy on the terminal has become another key problem in the application. In order to improve the exchange efficiency of data in mobile environment, based on the general compression algorithm, according to the characteristics of GML data, the structure and spatial data are separated by parsing. Label compression and incremental compression are used respectively, so that the compression ratio of the data is greatly improved and the data volume is effectively reduced. In order to ensure the security of commercial data in mobile environment, the security of data encryption is studied. In the encryption of data, it no longer depends on the traditional wireless link security mechanism. Using the security standard of XML for reference, according to the characteristics of GML data, an encryption algorithm based on elements and element content is written, which makes it possible to encrypt huge GML data. The implementation of symmetric encryption and asymmetric encryption in GML element encryption is also studied. In the environment of. Net, the prototype system for the previous research results is built by using C # language, and the prototype system is tested and analyzed under different terminal conditions. Aiming at the application problems in different terminals, this paper probes into various problems in the application from the aspects of the construction of the platform and the deployment of the software, and gives the appropriate solutions.
【學(xué)位授予單位】：江西理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：P208

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 許捍衛(wèi);移動(dòng)式GIS發(fā)展的關(guān)鍵技術(shù)及應(yīng)用前景[J];測(cè)繪工程;2003年01期

2 張翰林;張國(guó)定;李隨意;;基于GML數(shù)據(jù)的地理信息發(fā)布系統(tǒng)的加密研究[J];測(cè)繪科學(xué);2009年S1期

3 張翰林;魚群;李隨意;;地理信息發(fā)布系統(tǒng)的安全防護(hù)研究[J];測(cè)繪科學(xué);2010年03期

4 張海濤;閭國(guó)年;張書亮;原立峰;姜杰;;移動(dòng)GIS中GML數(shù)據(jù)壓縮技術(shù)研究[J];地理與地理信息科學(xué);2008年05期

5 李光師;;基于GML的地理信息共享系統(tǒng)的加密方法研究[J];鞍山師范學(xué)院學(xué)報(bào);2012年04期

6 杜成龍;關(guān)佶紅;王治;;GML空間數(shù)據(jù)流壓縮算法研究[J];計(jì)算機(jī)工程;2007年01期

7 高波;郭朝珍;丁善鏡;;基于GML矢量圖層分割的空間數(shù)據(jù)分布式協(xié)同處理的研究[J];計(jì)算機(jī)應(yīng)用;2009年01期

8 葉成緒;;XML加密技術(shù)在校園網(wǎng)中的應(yīng)用[J];青海大學(xué)學(xué)報(bào)(自然科學(xué)版);2009年05期

9 王騰蛟,高軍,楊冬青,唐世渭,劉云峰;面向XPath執(zhí)行的XML數(shù)據(jù)流壓縮方法[J];軟件學(xué)報(bào);2005年05期

10 駱惠清;;XML文檔加密技術(shù)研究與實(shí)現(xiàn)[J];蘇州科技學(xué)院學(xué)報(bào)(工程技術(shù)版);2009年01期

本文編號(hào)：2485021